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Finding the Fourth Proportional to 3,398.82, 4,690.30 and 1,906.71

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Solution

The fourth proportional to 3,398.82, 4,690.30 and 1,906.71 is: 2,631.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,398.82 : 4,690.30 = 1,906.71 : x
  2. Step 2: Convert to fraction form
    3,398.82/4,690.30 = 1,906.71/x
  3. Step 3: Cross multiply
    3,398.82x = 4,690.30 × 1,906.71
  4. Step 4: Simplify right side
    3,398.82x = 8,943,041.91
  5. Step 5: Solve for x
    x = 8,943,041.91/3,398.82
  6. Step 6: Final answer
    x = 2,631.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.